Explosive-engine.



vW. L. MARR.

EXPLOSIVE ENGINE. APFLICATIONHLEDQEPT-IQ.19H.

1,259,891. Patented Mar. 19, 191&

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W L. MARE.

EXPLOSIVE ENGINE. APPLICATION FILED SEPT, 19. I914.

Patented Mar. 19, 1918.-

UNITED STATES PATENT OFFICE.

WALTER L. MABR, OF FLINT, MICHIGAN.

EXPLOSIVE-ENGINE.

Specification of Letters Patent.

Patented Mar. 19, 1918.

Application filed September 19, 1914. Serial No. 862,454.

Toall whom it may concern:

' Be it known that I, WALTER L. MARK, a citizen of the United States of America, residing at Flint, in the coiinty of Genesee and State of Michigan, have invented certain new and useful Improvements in Explosive- Engines, of which the following is a specificat1on, -'reference being had therein to the I accompanyingdrawlngs.

The invention consists in the matters here-- inafter set forth and more particularly pointed out in the appended claims.

In the drawings,

Figure 1 is a View, partially in long tudinal section and partially in elevation, largely diagrammatic, of the upper portion of an engine cylinder that embodies features of the invention;

Fig. 2 is a view intransverse section taken on or about the line IIII of Fig. 1; Fig. 3 is a view intransverse section taken on or about line III-III of Fig. 1; and

Fig. 4 is a plan view, reduced in scale showing one form of arrangement of the valve operating mechanism with minor details omitted.

Referring to the drawings, the wali l of an'open-ended engine cylinder, that is herein shown with provision for water jacketing, encircles a piston 2 of conventional type that reciprocate adjacent to ports near or I at the-explosion end of the cyhnder. As

herein shown, these ports may be two in number, and oppositely disposed, one of them 3 forming the intake and the other 4, the exhaust. The ports are properly proportioned and deslgned to facilitate the proper ingress and egress of fresh charges and exhausted gases.

An annular casin 5, extends from the explosive end of the cy inder in axial almement therewith and is closed by a cap 6 that is preferably detachable. Longitudinal guide channels 7 are formed in the outer face of the casing 5 in vertical alinement severally with the ports 3 and 4 the lower'portions of the channels opening through the casing wall. Valve rods 8 and 9 in longitudinal sliding engagement in these channels, have lateral end portions 10 and 11 or studs that extend through the lower open portions of the guide slots and engage in bosses 12 and 13 of segmental valve sleeves 14 and 15. Re-

movable inserts 01' plates 28 retain the valve rods 8 and 9 in operative position and permit free access for inspect on, repair or assembling, and may aid also in maintaining the casing 5 and cap 6 in position. Or other suitable operative connection any be made between the members 8 and 9 and the segments 14 and 15 whereby reciprocation of the members 8 and 9 produces corresponding movement of the segments, which have 1011- gitudinal sliding engagement with the inner periphery of the casing 5. A cylinder head 16 concentric with the casing 6 acts as a spacer guide between the segments 14 and 15 beyond the cylinder ports, the bearing bosses 12 and 13 plying in outer longitudinal recesses formed in the head or )referably in ribs 17 thereof. A pair of paclting rings 18 on opposite sides of the open end portions of the guide channels 7 or other suitable means between the head 16 and the segments 14 and 15 minimize any tendency to leakage around the latter. The head may or may not be integral with the cap, ably chambered forwater-cooling or jacketmg.

A coin shaft 19 that is arranged to be operated in timed relation to the movement of the piston 2, is appropriately mounted on the casing 5 or cap 6 and is provided with-a pair of cams 20 and 21. A rock arm 22 is pivoted at one end to a stud 23 on the cap to oscillate over the cam 20 on which it .rides, the other end being loosely articulated as by a pin and slot connection inclicated at 24 to the link or slide rods 9. The other cam 21 which is in opposite relation to the cam 20, oscillates a rock arm 25 pivotally attached at one end to a stud 26 of the cap 6 and loosely articulates at the other as indicated at 29to the link Or slide member 8. The arm may have springpressed relation with the cam as herein diagrammatically indicated, or positive connection therewith. The parts are so proportioned and disposed that under the 0pas desired the ports may be uncovered or closed with such rapidity as to provide for high piston speed. The major portions of the segmental sleeves are not exposed to the high temperature of the combustion end of the cylinder and therefore are not liable to stick or jam in the annular ways in which they oscillate. As the area then exposed is very slight in comparison with the portions of the segments which slide in the annular guiding space formed by the head and casing entirely beyond the explosion space of the cylinder, lubrication is readily effected and undue wear and tendency to stick or bind, difiiculties common to slide-valves in explosive engines, are prevented. The mechanism for operating the valve segments may be of any preferred type consistent with good mechanical design.

Obviously, changes in the details of construction may be made without departing from the spirit of my invention and I do not care to limit myself to any particular form or arrangement of parts.

What I claim is:

1. In an explosive engine, a cylinder hav ing ports near the open exhaust end. a casing mounted on the explosion end in axial alinement with the cylinder, 21 head mounted in the casing and arranged to form there-- with an annular guideway, a segmental valve reciprocable longitudinally in the guideway, a rotatable cam mounted on the head, and oppositely disposed oscillatory arms pivoted on the head in operative rela tion to the cams and coupled to the sleeve Lessee 1 to open and close the ports in timed relation to the engine cycle.

2. In an explosive engine, a cylinder having ports near one end, a casing on said end in axial alinement with the cylinder, a head in the casing cooperating therewith to form an annular valve guideway in axial alinement with the cylinder, a segmental valve reciprocable in the guideway in alinement severally with the cylinder ports, members reci nocable longitudinally of the easing parallel to the segments to which they are severally coupled, a cam shaft and cams mounted on the head and rock arm pivoted on the casing head and operated by the cams to shift the reciprocable members to which they are respectively pivoted, the segments and cooperating mechanism forming a unit bodily removable from the cyl inder.

In an explosive engine, a cylinder ported near the open explosion end, a casing alined with the cylinder on the open end thereof, a cap mounted on the casing, an annular head depending into the casing and forming with the latter an annular guide space alined axially with the cylinder bore, slide valve members reciprocable longitudinally of the casing in this guide space, a valve rod for each guide member reciprocable in an exterior longitudinal channel of the casing, a lateral extension on each rod extending through an opening into the guide space from the channel and engaging into a recess in the adjacent valve member, a rock arm for each segment oscillating on the cylinder cap articulated to the valve rod, a cam shaft journaled on the casing transversely to the rock arms and provided with cams for lifting the latter, and spring members for maintaining operative relation between the cam shaft and reel; arms.

In testimony whereof 1 ai'iix my sigi'iature in presence of two witnesses.

WALTER L. MARE. Witnesses:

F. A. ALLEN, W. L. Nelson. v 

